Improvement in brick-machines



n. B. RICH & c. D. HUBBARD.

, Improvement in Brick Machines. No.124,761.- PatentedMarch19,1872.

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PATENT OFFICE.

DWIGHT B. HIoH AND oHAHLEs D. HUBBARD,OF CAMBRIDGE, ASSIGNORS TO THE NEW ENGLAND BRICK COMPANY, on BOSTON, MAss.

IMPROVEMENT IN BRICK-MACHINES.

Specification forming part of Letters Patent No. 124,761, dated March 19, 1872; antcdated March 2, 1872.

I To all whom it may concern:

We, DWIGHT B. RICH, of Boston, county of Suffolk and State of Massachusetts, and CHARLES D. HUBBARD, of (Jambrid ge, county of Middlesex and State'of Massachusetts, have invented certain new and useful Improvements in Brick-Machines, of which the following is a specification:

The Nature of the Intention. The nature of our invention consists in certain improvements made upon the invention secured to E. P. H. Capron by Letters Patent of the United States dated May 8, 1866, and numbered 54,500. The principal feature of our invention consists in combining with the molding or formingpart of the machinery of the (la-pron mill a system of steam-chambers, by means of which the surfaces which are in contact with the brick are kept hot, the object bein gto prevent adhesion of the clay. Our inven tion also embraces some mechanical devices which can be best understood by reference to the drawing and specification.

Description of the Accompanying Drawing.

Figure 1 is a perspective view showing our invention. Fig. 2 is a vertical section of the same. Fig. 3 is a plan showing the crushing mill. Fig. 4. is a section showing the device for regulating the pressure on the brick. Fig. 5 is a section showing a part of the mold-wheel and the device for smoothing the upper edge of the brick.

General Description.

. serves to drive the clay down, and to force itinto the mold D in the wheel 0. The wheel G, with its molds D D, followers D D, and way G, is made and operates as described in Letters Patent granted to (Japron, above referred to, except that it is hollow, that it has within it a steam-chamber, which surrounds all of the molds. Into this chamber the steam is'admitted through the hollow shaft 0, Fig. 2, the steam being supplied by the pipe 1, Fig. 1. E,'Figs. 1 and 5, is a plate made as shown in section in Fig. 5, with a sinkage, F, the bottom of which is perforated, as shown. The object of these perforations is to allow any surplus clay that may be in the mold to be pressed out, as the greatest pressure takes place at the time when the mold is exactly under the part F of the plate E. The plate E is also hollow, as shown at H, Fig. 5, so that steam may be admitted to it through the pipe R. The followers D, Figs. 2 and 5, are held up so that thenpper ends are kept even with face of the mold-wheel 0, until they arrive at -apoint near the pug-mill, then they drop so as to leave the mold open and of a depth somewhat in excess of the width of the brick. As they pass under the propeller of the pug-mill they are filled with clay. As they pass out and under the plate E the follower is'pressed upward by the wedge K, Fig. 4; this compresses the brick to its true size, the surplus clay being forced through the openings in the sinkage F, Fig. 5. To adjust the wedge K so as to raise the follower D to the proper height for compressing the brick, we place it upon an incline, K said incline being adjustable 1ongitudina-lly by the screw K so that as the incline is moved backward and forward the wedge K is lowered or raised.

We claim as our invention-- 1. The arrangement of the vertical molds D D in a hollow vertical steam-drum, 0, said steam-drum being provided with steam, and

operating with the plunger D and top plate E, substantially as described, and for the purpose set forth.

2. The top plate E made with the steamehamber H and perforated sin kage F, substantially as described, and for the purpose set forth.

DWIGHT B. RICH. CHARLES D. HUBBARD. Witnesses:

WILLIAM EDSON, FRANK H. NUTTER. 

